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Changing the teflon coupler?


braddock
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Posted · Changing the teflon coupler?

Hi guys, I blew the dust off the UM2 to do some prints last week, and have been having nothing but failed prints, all due to under extrusion.

I have some spare couplers, so might as well change it out, but before I do, are there any instructuions on how to do it? I've never pulled the nozzle apart before.

I did do a search, but it's didnt give me a specific topic on the subject.

Cheers.

 

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    Posted · Changing the teflon coupler?

    That above video has you take off the 3rd fan. This is completely unnecessary - just skip that step.

     

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    Posted · Changing the teflon coupler?

    Ok, thanks guys. Is the new glass filled coupler supposed to last longer? or will it eventually need changing too?

     

     

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    Posted · Changing the teflon coupler?

    It too, will need changing eventually.

     

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    Posted · Changing the teflon coupler?

    Check out post #20 of this thread for a pic of the correct gap.

    http://umforum.ultimaker.com/index.php?/topic/8513-underextrusion-need-help-with-this-one/

     

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    Posted · Changing the teflon coupler?

    ....

    question 1, is it time to get a replacement teflon coupler?

    question 2, when was the new coupler material introduced?

     

    Q1 it probably is worth looking at it to check for wear and deformation, my last one lasted about 600 hours, but it depends on what print material you have been using. Higher temp material seems to cause more wear

    Q2 new teflon coupler was introduced last spring (April/May) last year

    I would also recommend its time for lubrication of all the rods too, I use thin oil on a cloth for the rods and grease for the Z axis

     

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    Posted · Changing the teflon coupler?

    If you printed 1000 hrs don't be bothered with repairing the coupler, just replace it, its a (relatively) cheap consumable ...

     

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    Posted · Changing the teflon coupler?

    Yes, I would bet money your teflon coupler is toast so just replace it.

     

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    Posted · Changing the teflon coupler?

    I would stick with what is displayed in that thread I linked.. And we would have to see pics of the coupler to tell you if it's salvageable. Given the amount of hours you have on it, that's highly unlikely.

     

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